Cows can sleep standing up, but they can only dream lying down.
745
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
The largest breed of rabbit is the Flemish Giant.
65
You forget 90% of your dreams.
256
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
The strangers in your dreams are actually people that you've seen in real life.
50